Responding to customer requests for a mid-curve Eurodollar option that expires at the same time as the Treasury options, CME Group launched Treasury Matched Mid-Curve (TOMMi) options in November, 2007. These options are part of the weekly mid-curve suite of Eurodollar options, but have extended expirations to match the longer-dated Treasury options. For example, at this time there are five weekly mid-curves: serial mid-curves for Nov and Jan, and quarterly mid-curves for Dec 08, Mar 09, Jun 09 and Sep 09. The CME Group will list mid-curve options to match the Feb 08, Mar 08, Jun 08, Sep 08 and Dec 08 Treasury options expirations.
The availability of TOMMI options:

• Removes the date mismatch between Treasury options and mid-curve options
• Facilitates more precise volatility spreading
• Creates more spreading opportunities with Eurodollar, Treasury and other OTC options

CME Group will list TOMMi options concurrently with the listing of Treasury options as they open. The ticker symbol for Globex is TE0 (T-E-zero) and the ticker symbol for open outcry is EOT (E-zero-T).

When the TOMMi option is within five weeks of expiration we will suppress the listing of the weekly option that would expire on the same day. This is the same procedure currently used for the mid-curves when they expire on the same date as a weekly. At any one time you may have traditional mid-curves, weeklies and a TOMMi option simultaneously listed on the calendar for the next five weeks.
View One-Year Mid-Curve Options Trading Calendar (PDF) which includes expirations for TOMMI options as well as Weekly Mid-Curve Options. 
View Weekly Mid-Curve Options.

 For more information on Treasury Matched Mid-Curve options, contact Jeff Kilinski, Director, Interest Rate Option Products at (312) 648-3817 or jeff.kilinski@cmegroup.com, or David Reif, Associate Director, Interest Rate Products at (312) 648-3839 or david.reif@cmegroup.com.